Adding-machine.



W. H. CALLAHAN. ADDING MACHINE. APPLICATION FILED PEB. 6, 1909.

978,1 1 1 v Patented-Dec. 6, 1910.

3 SHEETS-SHEET 1.

M I v- MM ATTORNEYS W. H. GALLAHAN.

ADDING MACHINE. APPLIOATION FILED FEB. e, 1909.

. 978,1 1 1. Patented Dec.6,1910.

3 SHEET B-BHEET 2.

'ZI'JIZ'i-i'niiiiiiii!" ATTORNEYS W; H. GALLAHAN.

ADDING MACHINE. APYILIOATIONQILED FEB. s, 1909.

Patented Dec. 6, 1910.

3 SHEETS-SHEET 3.

m m. M w

UNITED STATES PATENT OFFICE.

WILLIAM H. CALLAHAN, OF UTICA, NEW YORK.

To all whom it may concern: p I

Be it known that I, WILLIAM H. GALLA- nax, of Utica, in the county ofOneida and State of New York, have invented certain new and usefulImprovements in Adding-- Machines; and I do hereby declare that thefollowing is a full, clear, and exact description thereof, which willenable others skilled in the art to which it appertains to make and usethesame, reference being had to the accom )anying drawings, and to theletters of ref erence marked thereon, which form part of thisspecification.

This invention relates to improvements in adding machines, and has forits principal object to provide a mechanism to automatically andaccurately'form and display results in total form of the addition ofvarious numbers when same are successively indicated on the machine.

Among the further objects'of the present invention are: to provide amachine compact in form and light in weight; to provide a machine themechanism whereof is simple, durable and economical in construction; andto provide a machine wherein the parts may be returned to the initial orzero condition rapidly and simply.

One embodiment of the present invention is disclosed in the structureillustrated in the accompanying drawings, in which like characters ofreference denote corresponding parts in all the views, and 1n wlnchingmachine constructed and arranged. in accordance with the presentinvention; Fig. 2 1s a horizontal section ofthe machine show-- ing themechanism below the top, of the con- I taining casing in plan; Fig. 3 isa cross section of the machine taken on the line -'3 '3 in Fig. 2; Fig.4 is a cross section of themachine taken on the line 44 in Fig. 2.; Fig.

is a cross section of the machine taken "on the line 55 in Fig. 2; Fig.6 is f3. detail view in elevation of the registering Wheels of themachine shown in conjunction with the carrying wheel and mechanism'fo-roperating the same, and also the resetting wheels; Fig. 7 is a detailview in side eleva- Speciflcation of Letters Patent.

Application filed February a, 1909i semi 110,476,353.

ADDING-MACH'INE.

Patented Dec.

vtive of a conveyer link shown in conjunction w th a computator barmount-ed therein; Fig. 10 1s a detail view in isometric rspectlve of acomputator bar'construct in accordance with the present invention; Fig.11 is a detail view in isometric erspective of a link of the, conveyerfor t e computator bars; Fig. 12 is a detail view in per spective on anenlarged scale, showing one of the register wheels and the toothed wheeltherefor; and Fig. 13 is a diagrammatic view'in sideelevationillustrating the action of the wheels of the carrying mechanismof the registering wheels. I

The instrumentalities shown in the accompanying drawings may be dividedinto three distinct groups, to wit, the computing mechforward or outerend whereof is provided with a seriesof teeth forming a rack 16. Figure1 is a perspective view of an addi The upper surface of the bars 14 isprovided with a series of indentations 17 17, deep enough to receive in.holding relation the point of a pencil or stylus. It is by means oftheindentations 17,17 that the bars 14 are engaged and shifted as per theselection. Arranged in series orderby the Side of the said indentationsare numerals from zero to nine; The indentations and the numeralsdisposed at the side thereof, bearfixed relation with the teeth of therack 16, for reasons whichwill be hereinafter more fully setforth. Thebars 14 are provided with lateral flanges 18,18, which guide the sameintheir operation.

The bars 14 are supported in elongated link members 19. The linkmembers, when joined, constitute an endless belt conveyer, theconnection between, the links being formed by hinged extensions 20, 20.The links 19 are provided with edge slots, 21 21, into which areextended the flanges 18, 18 to slide therein in guided relation. Thedepended flange 15 of the bars 14 extends into 1 indentation showing thenumeral 3, the op a groove 22 formed inthe under side of the l 4 l'engaged, until his pencil or stylus is arrested link members 19. p

.The endlesschain formed by the links 19 when joined shows a series ofinwardly projected tooth-like members, in which are formed the grooves22. The conveyer is supported by wheels 24, 24, in the periphery ofwhich are formed recesses 25, 25 arranged andadapted to receive theprojections 23, 23 of the said conveyer. The conveyer-is disposed inlateral arrangement in a casing 26, as shown in Fig. 2 of the drawings.The conve er is also mounted on the rear end of the said casin or on theend removed from an operatin ar 27. (See Fig; 1 of the drawings.) hewheels 24, 24 are united by a sleeve 28 'in fixed relation'to preservethe uniformity of action, as of a drum, and by means of the elongatedform of the sleeve to provide a bearlng fora shaft 29. The shaft 29 isextended from a stud 30 ri idly connected to'the casing 26 of the macine, The wheels 24, 24- are idlers, turning onlywhen in the operationthe conveyer is shifted to the left, as shown by the arrow in. Fig. 3 ofthe drawings, which is the direc tion followed by the said conveyer inthe usual operation of the machine.

The cover 31 of the casing 26 is provided with aslot having twoextensions 32 and 33. The conveyer is so disposed that the indentations17 of the various bars normally pass under and in line with theextension 32 of the said slot. The extension 33 of the said slot isinclined, as shown in Fig. 1 of the drawings. The length of theextension is such that when an indentation of each of. the bars isengaged in the elongated extension32 and moved to the bottom of the ex.-

tension 33, the conveyer carrying all of said bars is shifted one linkin its'movement to the left, as seen in Fig. 3. .It is by thisarrangement that the conveyer is moved in its path. The cover 31 isfurther provided with a series of openings 34, 34, arranged-in parallelposition, as shown in Fig. 1 of the drawings. The openings 34, 34 arerovided to view the selective arrangement 0 the bars 14 in setting upthe number to be added to the then known total. As will hereafter beseen, the same openings serve to view the re 'stered total.

he first operation of the machine is that employin the conveyer, theselective bars 14, the s ot extensions 32 and 3.3 and the openings 34,34, as it is by means of these instrumentalities that the number tobeadded is set up. The operation is as follows: Assuming that the numberto be added is 345, the operator inserts the. end of a encil or stylus1n the indentation showing in the extension 32 opposite the numeral 3 ofthe set of numerals formed around the-ed e of the said extension 32.Having engage the erator draws the bar 14 with which he is thus at theextreme bottom of the extension 33. By reason of the inclined osition ofthe extension 33, when the sty us is brou ht in contact'with theslanting wall thereo it is compelled to travel laterally as well asdownwardly. v The lateral travel moves the posed with reference to thefirst of the open-- lugs 34. 'In this position the adjusted bar 14remains until, as hereinafter described, it is reset v to its normalposition within the link' 19 to which it belongs. set the first numeralof the number desired,

Having thus the operator places the stylus in the indentationsetopposite the numeral 4 on the' edge of the extension 32, which nowappears 1n line with the said extension. The operation of drawing thissecond bar 14 downwardlyand laterally is repeated, with the result thatthe numeral 4 appears at the first of the squared openings 34, while thenumeral 3, and'the first bar 14 carrying the same, has been movedlaterally to the left and is exposed through the second of the series ofopenings 34. In the latter case the indentation opposite the numeral 5in the bar 14 last set remains at the bottom of the extension .33, andthe conveyer has been shifted so that the succeeding bar 14 is presenteda under the extension 32. The last, and final, numeral 5 is to bebrought down, and this is accomplished by placing the stylus in theindentation set opposite the numeral 5 on the extension 32, and thethird bar 14 is drawn down until the numeral 5 of the third bar isexposed in the first of the openings- 34, while, b reasouof the movementof the conveyer, t e bars which have been reviously adjusted to exposethe numera s 3 and 4 are disposed in line with the second and third ofthe 'said openings 34. In this position it is found that the numberdesired to be added to the total, to wit,"345, is exposed in properorder in line with the openmgs 34, 34. In this position the number 345is added to the previous total by the operation of shifting the bar 27backward in the .direction of the arrow shown in Fig. 1 of the drawings.To shift the bar 27 the operator engages a handle 35 and pushes thereonuntil the rods 36,- 36 connecting the bar 27 with the interior mechanismare arrested In the operation as above set forth, it will be seen thatthe extension forwardly of the variousbors 14 has difiered. Each of theadjustin 38 impinges upon the several bars I4 in succession andaccording as they are more or less extended. When the rods 36, 36 arearrested at the ends of the slots 37,- 37, the bar 38 has'reset all ofthe extended bars 14 in their normal position in the links 19-, 19. Inthus resetting the bars'14, 1 4, the register'ing mechanism has beene-perated'to add the number to the former total, which numberhas-beenseleetivelg' engaged in the manner as above set fort;

The registering mechanismconsists of a series of wheels 39, 39. Thewheel's39 are loosely but snugly mounted on a fixed shaft 40., and arespaced in set relation each to the o'ther.- The number of wheels 3-9 mayvary according to'the needs and capacity of the machine, as required.The fixed shaft 40 is suspended in the ends of, swingingfarms 41, 41.The arms- 41, 41 are pivotally mounted on round extensions of a shaft42, or, if preferred, in pivots formed 43. The wheels 39 are divided-onthe periphery into ten' equal spaces, a and each space is provided witha numeral in,serial order ranging from Fixedly mounted on wheels 39'is aten-toothed cog wheel 44. The cog wheels 44 are related to the numeralson the peripheryof the wheels .39 in the same lateral separation as arethe racks 16 with relation to the numerals carried by each of the bars14.. In.- the various adjustments of the conveyor formed by the links,19, each of the bars 14 are so disposed that the teethin the racks 16-are alined with the teeth in the cog wheels 44, and. this in theretracted aswell as: the projected position of the said bars 14. 1 i j aThe arms41, 41 carrying; the shaft 40 and the wheels-39, 39 aresuspended from slotted arms 45-, 45 by means of extensions 46- 46 andpins 47 provided in ends of the said extensions. The pins 47' areextended into a slot 48 with which each of the arms '45 is provided. Inthe normal position, which is that assumed when wardlydisposed, and asshown in Fig. 7 of the drawings, the shaft 40 and wheels 39 carriedthereon are removed from contact.

with the. racks 16 of the bars 14, as seen in Figs. 4 and 7 ofthedrawings. In this sitionthe pin 47 rests in thelower end oFtheinclinedsection 49 of the'arms 45. When,

in standards 43,.

zero upward to nine. thesideof each of the the bar 38 is out-v wheels onthe. happening however, in the operation of the machine, the bars 27 and38 are advanced, the pins 47 are forcedby the incline of the slotsection of the wheels 39 to toothed en agement with the racks 16 beforethe bar 38 strikes upon the farthest advanced of the said bars 14.

Hence, when the bars 14 are impinged upon by the bar 38 and moved backinto the links 19 to which they belong, the teeth of the rackslfi areengaged with the teeth of the. cog wheels 44, and thereby tion of thewheels 39 travel of the bars 14. s it will be remembered that the bars,14 have been extended with reference to a certain number, and left insuch extended position, it will be seen that by resetting that bar tozero the samenumberof teeth have passed over the cog wheels 44. Toillustrate:If the wheel 39 shown in Fig. 121 of the drawings is inposition to expose the numeral 4 in the opening 34, and. the bar 14 isadvanced so that the numeral 3-on the said said opening 34, when thewheel 39 is ele-v vated and the teeth in the said wheel 44 engage thebar, the engagement will be between the teeth directly in line with thenumeral 4 on the wheel 39 and the numeral 3'on the bar 14. In thisposition, if the bar 14 be moved back until the teeth of the rack 16thereon release the teeth of the cog wheel 44, itwill be found that thewheel 44 and wheel 39 connected therewith have traveled the. distance ofthree teeth of the wheel 44, presentingat the opening 34 the numeral 7roportioned to the complete a rotaon the wheel 39, which numeral 7 isthe added result of the former number 4 plus the added selected number,3; It will be understood that this rotation ofthe wheels 39 isefl'e'ctedon each of the wheels 39 independently. It will also. be seenthat as there are' but ten numerals on each wheel, it becomes necessaryto carry the total ,from one wheel to another, comptometer, but bymeans'of instrumentalities-independently-operated. :.1 f

The carrying mechanism employed herein consists of a series of staggeredspur-carrying wheels 50, equaling in number the wheels 39, and having adouble series .of' spurs in parallel planes divided on the median lineofsaid wheels and in staggered or. altered relation. vOne set of.spursisalined with and disposed in the same plane with the cog wheels 44, andis ada ted to engage the teeth, of the said whee s to move the said ofcertain operations. The said carrying wheels-are loosely and extendedbetween the arms 41, 41, and disposed in parallel relation to the shaft40.

The second series of s urs formed on the said wheels is alined with andextended in the plane of a single toothed extension 52,

which is fixedly mounted on the side of each of the wheels 39. Theextension 52 is adapted to impinge upon aspur of the wheel 50 at eachcomplete revolution of each of the wheels 39, and when each of the saidwheels has rotated to expose the numeral zero under the opening 34 abovethe said wheel, which is t e position when the total of the ten numeralsonthe said wheel has been employed. The e' ""nsion 52, when thus movmgthe carryizg wheel 50, places the spur on the opposite side of themedian line of the said wheel 50 in enga ement with one of the teeth ofthe cog w eel 44 mounted on the wheel 39 next succeeding in theprogressive system of numbering to which this machine is adapted. Inthis position wherein one of. the spurs of the wheel 50 is engaged withthe co wheel 44, a spur of the said wheel 50 is isposed in the path ofatappet extension 53 mounted on the shaft 42. The shaft 42 is revolvedone complete revolution when the bars 27 and 38 are re-. turned to theirnormal position after having set the various bars 14. The carryin wheels50 are so constructed that when t c said tappet extension 53 moves thespur carrying wheel, the spur which was engaged with the cog wheel44.passes from such en age-- ment, while the spur on the o posite si eof the median line next succeeding is placed in the path of the toothedextenslon 52 to be impinged upon when next the said toothed extenslon isrotated to move the said spur carrying wheel. Until thus moved by thetoothed extension 52 the 5 ur carrying wheel remains quiescent. T eshaft 42 is pivotally mounted in the standards 43, 4 3, and

is constructed to rotate in one direction only.v Fixedly mounted on theshaft 42, at the one end thereof, is 'aratchet wheel 54, engagin theteethuof which is a pawl 55. The-paw 55 is of usual construction, beingspring seated [and adapted to over-ride the teeth of the, ,ra-tchet'wheel 54 when agear wheel 56- on which the said ratchet is pivoted isbeing retracted. Permanently engaged with the teeth of the, wheel 56 isa rack extension 57 mounted, on a, vertical arm 58,

and exten. ed therefrom in parallel relation to the arm- 45. The wheel56 is loosely mounted on the shaft 42.

When now the bars 27 and-38, with their.

connected structural elements, are advanced to reset the bars 14, theextension 57 is carried forward, rotatin thewheel 56 backward withoutdisturbmg the shaft 42 and tappets 53 thereon, the pawl 55 overrunningthe teeth of the ratchet wheel 54. When in warn that the said shaft 42is revolved one complete rotation. It is this rotation of the shaft 42which, as stated, advances any wheel 39- with the teeth of the cog wheel44 of which the carrying wheel 5O may be. engaged. If the carrying wheel1s not thus engaged the tappets 53 do not impinge upon the spurs of te-said carrying wheels.

In the operation .of the mvention, numbers of any magnitude aresuccessively added to the registering wheels 39, 39, increasing thetotal result, and exposing the same after each operation in line withthe openings 34,

34. The limit of the total additions is, as

stated, varied according to the demand, and by increasing or decreasingthe number of wheels 39, 39.

When in the course of operation of the machine the total sum has beenacquired and taken off for record, if such be the purpose, it becomesnecessary to-reset the machine to the initial or zero register. This isaccomplished by what is hereinbefore designated as the resettingmechanism. The resetting mechanism consists of a series of cog wheels59, 59 fixedly mounted upon a shaft 60,

which shaft issuitably mounted in bearings in the casing 26, andprovided with a milled head 61 on the outside of the machine. The milledhead isv employed in rotating the shaft- 60 and wheels 59 connectedtherewith.

In the normal position of the shaft 40 and the wheels 39 mountedthereon, theco wheels 44 rest in toothed engagement with the wheels 59,the wheels 39 being supported thereby. The wheels 59 are laterallyadjust-,

ed with reference to the cog wheels 44 to engage only a half of the faceor body of the teeth formed on the said cog wheel. One of the saidteeth, to wit, the tooth 62, is muti- .lated by eliminating the half ofthe said tooth which would engage the wheel 59.

. When in the'course of the rotation of the cog wheel 44 by thewheelf59the said wheel 59 is alined with the mutilated tooth 62, it.

misses engagement, and the cog wheel 44 and wheel 39 connectedtherewithare broughtto an arrested position. In this arno reste positionthe numeral indicatin zero on the wheel 39 is alined directlyun er theopening 34. This operation being repeated until each. of the wheels 39is thus disposed,

it will'be found that the numeral exposed under each. of the openings34'- is the-Zero numeral. In this position the registering mechanism isreset, and is ready for the succeeding computation. In retracting thebars 27 and 38, and mechanism connected therewith, I employ spiralsprings 63, 63, as-a' sa1d conveyer; a

preferred form of mechanism for accomplishing, this purpose. It will beunder stood, however, that other m'causfmay be employed as a substitutewithout varying the spirit of the present invention.

What I claim as new and desire to secure by Letters Patent is :f

1. An adding machine, comprising a plurality of rotary registeringmembers disposed in alined position; a plurality of reciprocableselective members disposed in parallel arrangement, having manipulatingon in numerical series transmission mechanisms to operatively connectsaid registering and selective members when said selective members arearranged in composite order; a conveyer to support said selectivemembers in sliding relation to permit lateral'movement of said memberson resetting mechanism ardevices formed thereranged to return the saidselective members v lating devices are carried to necting the adjacentmember disposed to the right.

CIPIOCHblQ selective membe 2. An adding machine, comprising a pluralityof rotary registering members disposed in alined position; a pluralityof rers disposed in parallel arrangement,- saidselective members havingmanipulatingdevices formed thereon in numerical series order; aplurality of transmission mechanisms to operatively connect saidregistering and selective members whensaid selective members arearranged 1n composite order; a conveyer to support said selectivemembers in sliding relation to permit lateral members on said conveyer;a resetting mechanism arranged to return the said selective members totheir initial position; a guide slot having an elongated extensiondisposed at the right of said' registering members and in parallelarrangement with saidlmanipulating devices, said slot having a lateralbranch extended toward said registering devices whereby the saidselective members are disposed successively in line with the first ofsaid registering members; and a carryin mechanism connecting said re'stering mem is to move each of said mem ers one unit spacesimultaneousl with each complete revolution of the ad acent member dis.-posed to the right. 7

transmission mechanisms to said selective members order; a plurality ofmovement of said An adding-machine, rahty pf rotary registering membersdisposed 111 alined position; aplurali-ty of reciprocable selectivemembers disposed in parallelarrangement, said selective members havingmanipulating devices formed thereon in numerical series order; aplurality of operatively connect said re istering and selective memberswhen said stiective members are arranged in composite order; a conve erto support sa1d selective members in sliding relation to permit lateralmovement of said members on oomprisinga plusaid conveyer; a resettingmechanism arranged to return the said selective members to their initialsition; a guide member disposed in parail l arrangement w th sa1dmanipulating devices and to the rlght of said registering members, saidlde member having an extension toward sa1d re storing members adapted todispose the said selective members inline with the first of saidregistering members when said mani ulating devices are carried to theend of sa1d extension; a carrying mechanlsm connecting said registeringmembers to moveeach ofsaid members with each complete revolution centmember disposedto the right; and a resetting mechanism for saidregistering devices operable at will for rotating each of saidregistering members to their initial position.

4, An adding machine, comprising an endless conveyer belt disposed intransverse arrangement; rotary members for supporting said belt; aplurality of selective bars one unit space simultaneously slidablymounted on said belt to be laterally extended therefrom, said barshaving a plurality of manipulating devices formed thereon in numericalseries order, said manipulating devices on each bar being normallyalined on said conveyer; a plurality of rotary registering membersdisposed in alined position and rotatively mounted in the planes ofextension of said bars; and a framing member having a guide slotprovided with a vertical extension equal in len 11 to and disposed abovesaid manipulatlng devices locatedat the right of said re isteringmembers, said slot having a branci extended toward said registeringmembers. r

5. An adding machine, comprising an endless conveyer belt disposed intransverse arrangement; rotary members for supporting said belt; aplurality of selective bars slidably mounted on said belt to belaterally extended therefrom, said bars having a. plurality ofmanipulating devices formed thereon in numerical series order, saidmanipulatin devices on each bar being normally alined on said conveyer;a plurality of rotary registering members disposed in alined positionand rotatively mounted in the planes of extension of said bars; and acover of the adja- "said registering ,mem ers to ex for said selectiveand registering members provided with a guide slot having a vert calextension in line with said 'manlpulatm devices, said slot bein locatedto the right 0 said registering mem rs, and having at the lower end abranch extended toward said registerin members, said cover being furtherprovided with openings arranged above.

ose the characterson the periphery thereo when so supplied.

6. An adding machine, comprising a conveyer' embodying a pluralityelongated hingedly connected ink members; a pl'urality of selective barsreclprocatlvely mounted on said link members; a cover for a said barshaving a guide slot formed there- 1 in, saidslot beingl provided with asection extended in para lel disposition with the said bars, and saidslot havin a branch extended from the lower end t ereof. to the left adistance equal to one composite space of said machine. r

' 7. An adding machine, comprising an endless belt conveyer; a pluralityofselective bars slidably mounted on said belt to be extended laterallytherefrom, said bars each provided with' wheel engaging devices; aplurality of rotary registering members each havin a wheel adapted tooperatively engage sai selective. bars; and means for moving said re'stering members mto engagement with t e said- 'selectlve bars when thelatter are extended from said conveyer.

8. An adding machine, comprising an endless beltconveyer, a pluraht ofselective bars slidably mounted on sai conve er to be extended lateralltherefrom, sai bars being each provide with a rack toothed member; aplurality of rotary, registering members disposed 1n alined positlon,and rotatively mounted on a plane parallel to the extension of saidselective bars, said members mem having secured thereon gear toothedwheels adapted to engage the said rack members; and means for movingsaid wheels to engage said rack members after said bars are extended.

9. An adding machine, comprising an endless belt conveyer; a pluralit ofselective bars slidably mounted on sai conve er to be extended laterallytherefrom, s'ai bars bein each provided with a rack toothed fier; aplurality of rotary registerin members disposed in alined posit on, anrotatively mounted on a plane parallel to the-extension of saidselective bars, said members having secured thereon gear rotary toothedwheels adapted to engage the said rack members; means for moving saidwheels to engage the said rack members after said bars are extended; anda push bar adapted to be reciprocatively operated to reset said bars onsaid conveyer after said bars are engaged with said wheels.

10. An adding machine, comprising an endless belt conveyer; a pluralityof selective bars slidably mounted on said conveyer to be extendedlaterally therefrom, said bars being each provided with a rack toothedmember; a plurality of rotary registering members disposed m alinedposition, and rotatively mounted on -a plane parallel to the extensionof .said selective bars, said members having secured thereon geartoothed wheels adapted to engage the saidrack members; a push baradapted to be reciprocatively operated to .reset said bars on saidconveyer after said bars are engaged with said wheels; and slotted armsvconnected with said push bar having a-sliding connection with saidregistering members to liftthe same into engagement with said rackmembers at the initiation-of the movement of said push bar.

11. Anadding machine, embodying a re istering mechanism, comprisin aplura ity of rotary wheels'mounted in spaced relation, and. providedwith display numerals serially arranged on the peripher thereof; aplurality of gear wheels the teet 1 whereof correspond in number to thesaid display numerals, one of said wheels being secured to the side ofsaid rotary wheels; a single toothed extension securel mounted on eachof said wheels, and out e face thereof adjacent to said gear wheels; aplurality of said single toothed extension, and each of saidescapementwheels having alternately arranged spurs disposed in planes on oppo-vsite sides of the median line of said escapement wheels; and tappetmembers mounted on a rotary shaft to extend in the path of said spurs,and arranged to move the same in alternation with said single toothedex.- tension to advance the said registering wheels and reset a spur inthe path of said single toothed extension. In witness whereof, I haveaflixed my signature, in resence of two 4th day of eb. 1909.

WILLIAM H. CALLAHAN. Witnesses: I

SARAH. E. CLARK, EMMA S; Hnssn.

I esca ement wheels, each loosely mounted in ine with said gear wheelsand witnesses, th s

